[Music] hello guys welcome back in this video let's learn about the histology of cornea the cornea is made up of five years the outermost layer is the non-keratinized stratified squamous epithelium that is the corneal epithelium this is the corneal epithelium the second layer is the anterior limiting lamina or the Bauman's membrane the third layer is the most thickest layer of the cornea the fourth layer is the posterior limiting lamina or the decimates membrane coming to the corneal epithelium it is made up of non-keratinized stratified squamous epithelium in the anterior 1/6 of the eyeball the sclera is replaced by transparent discs called as cornea the cornea is a colorless avascular transparent structure that has a very rich nerve supply coming to the second layer the Bauman's membrane or the anterior limiting lamina it is made up of fine collagen fibrils embedded in the matrix it gives a great stability and strength to the cornea the third layer that is the corneal stroma is formed by the substantial propria this is the corneal stroma the substantial propria or the corneal stroma is made up of type one collagen fibers that are embedded in the ground substance fibroblasts are present in the substantial problem they appeared to be flattened but seen in star-shaped the fibroblasts seen in the Stanzi propria are also called as kereta sites or the corneal corpus guilds now coming to the fourth layer that is this mattes membrane deep to the substantia propria there is a limiting membrane that is the posterior limiting membrane or the decimates membrane it is a true basement membrane it's also called as posterior limiting lamina this is the anterior and this one is the posterior coming to the fifth layer of the cornea it is the posterior cuboidal epithelium or the endothelium the posterior surface of the cornea is lined by a single layer of the flattened cells that constitutes as the endothelium of the anterior chamber this is the endothelium this layer is in contact with the aqueous humor of the anterior chamber they help in transfer of ions they possess numerous mitochondria and are united by neighboring cells by the help of desmosomes in these cells pump out the extra fluid from the cornea and they NGO Transparency by pumping out the excessive fluid from the cornea the first layer is the corneal epithelium that is non-keratinized stratified squamous epithelium the Bauman's membrane is the second layer or the anterior a limiting lamina the third layer is substantial propria or the Cardinal stroma the fourth layer is the Desmond's membrane or the posterior limiting lamina coming to the fifth layer it is the posterior border layer or the endothelium this is in brief about the coronal histology if you liked this video please subscribe to my channel and you can suggest the topics on I can make the videos [Music]